Did you run Helloworld.c as root? You need to either use sudo on all programs that use Phidgets, or set up your udev rules as outlined here: https://www.phidgets.com/docs/OS_-_Linux#Advanced_Information Thank you for your answer. Yes I run as root, I copied the Udev rules to rules.d, But nothing wo...

Hello, I am new to Phidget. My os in ubuntu 20.04. I have installed libusb-1.0-0-dev and all the other libraries. My problem is When I run the 'Helloworld.c' it stuck and shows these three lines: ''Opening... Phidget Simple Playground (plug and unplug managers) Press Enter to end anytime...'' I trie...